Re: [RFC PATCH] drm/amd/display: dont ignore alpha property

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On 2022-03-28 12:54, Melissa Wen wrote:
> On 03/28, Simon Ser wrote:
>> Thanks a lot for you patch! I've noticed as well that amdgpu ignores
>> the plane alpha property [1]. I'll try to find time to test it.
> Hi Simon,
> 
> So you've faced this kind of issue many times :/
> Let me know the results from your side, so we can use it to find the
> correct approach to solve this issue.

Thanks, Melissa, for looking into this. It does indeed look like we
should support that in amdgpu.

>>
>> [1]: https://gitlab.freedesktop.org/drm/amd/-/issues/1734
> Yeah, it looks like the same problem.
> 

Ooh, tentative looks neat. I'll have to give it a try.

Harry

> I also think the IGT test case (alpha-7efc) is not the best one because
> results can be affected by rounding issues. Maybe the test should be
> reworked, but first this alpha property issue should be clarified.
> 
> Thanks for the inputs!
> 
> Melissa




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